Auxiliary air-admission device



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Aug. 24, 1926.

ORNE) Patented Aug. 24, 1926.

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[M ran]; LEE, or BELLINGHAM, WASHINGTON.

AUXILIARY AIR-ADMISSION DEVICE.

' Application filed September 10, 1925. Serial No. 55,560.

fuel passing from the carburetor, thus giving' much better results than those obtained without the use of the invention or with some rather analogous devices now on the market. Vfith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing.

Figure 1 is an elevation partly in section showingthe application of my invention between a carburetor and an intake manifold. .Figure 2 is a vertical sectional view substantially on line 22 of 1.

Figure 3 is a vertical sectional view as indicated by line 33 of Fig. 1.

The invention includes a cast metal plate 1 having opposed flat sides and adapted to be secured between a carbureter 2 and an in take manifold 3, appropriate gaskets l being disposed between said plate, the carbureter and the manifold. The usual bolts 5 which commonly secure the manifold directly to the carbureter, may be used for securing the parts 1, 2 and 3 in assembled re lation if they be of sufficient length, but otherwise longer bolts must be substituted.

The plate 1 is formed with an opening 6 for communication with the manifold 3 and the discharge neck of the carbureter 2, said opening being by preference decreased in diameter from the flat sides of the plate 1 to an intermediate plane between said sides, and at these sides, the opening is of a diameter corresponding to that of the passages with which it must register. Thus, the air and fuel passing through this opening, are brought into more intimate contact with each other as they pass through the opening and it is also insured that the auxiliary air which is supplied at the central portion of such opening, shall thorou hly mix with the fuel.

Embedded in the plate 1 and extending transversely of the latter at one side-of the opening is parallel to a line extending diametrically across said opening, one'gend' 8 of this tube being closed, while its othere'nd opens at the edge of the plate. A plurality of branch tubes" 9, preferably three, are secured to and communicate with" theimain tube 7, said branch tubes all extending laterally from one side of the main tube, being embedded in the cast metal plate and having their free ends projected intothe opening 6 to provide long air discharge nipples 10. These nipples are bentiout of radial relation with the opening 6 and" they are obliquely disposed with respect to: the wall of this opening, to' impart a cyclonic inotion to the air d scharged by them. More'- over, these nipples extend obliquely toward the manifold engaging side of the plate 1 and they have their inner ends disposed near the center of the opening 6;

Ordinarily, in the usual constructionand relation of carburetor and intake manifold, the fuel nozzle of the former is disposed at the central portion of the" carbureter air passage, so that it supplies a spray of fuel to the central portion only "of this passage and the intake, while the air flows around this spray of liquid, along the Walls of the fuel intake to the motor. cylinders. Thus, a thorough mixture of fuel and air does not take placeprior to entry into the motor cylinders, with the result that thorough combustion cannot take place. By the use of my invention however, the supply a quantity of air to the fuel spray at the center of the fuel intake passage and the disposition of these nipples, causes a cyclonic whirling of all contents of the passage. Thus, the fu'elspray, the air from the carbureter around such spray and the i 6, is av main air inlet tube" 7,. which nipples 10 auxiliary airintroduced through the nipples, are all thoroughly mixed to provide a homogeneous, comparatively dry gas for passage to the cylinders. The fuel, delivered in this manner, obtains a much better result than can be obtained without the invention or with somewhat analogous structures heretofore placed upon the market. The efficiency creased and its is bettered. Moreover, carbon deposits are practically eliminated, due to the almost r perfect combustion'whioh takes place in the motor cylinders.

.If desired, cool air could be admitted to of the motor is greatly in- 7 performance in every way tlietube 7, but in most instances, I prefer to connect it with "an air heating tube 11 which has a portion in contact with the exhaust manifold 12 of the motor, entrance of air into this tubebeing controlled by an appropriate valve 13, which valve may be adjusted to obtain the best results. i A valve similar to this valve 13 could be used directly at the outer end of the tube '7, in

case cool air instead of hot air is to be admitted but in most-instances, the'inj ection of hot air obtains better results.

In manufacturing the dev ce, thetubes 7 and 9 are soldered together and are positioned across asuitable' mould, Then, the metal plate 1 is cast about these tubes, ap-

propriate cores being used to form the open- -in -6 andthe bolt holes through the plate.

Ai' ter the casting operation,.the nipples 10 are preferably bent to the desired oblique relatlon wlth the plate, although these tubes 7 could be bent prior to casting the plate.

Excellent results have been obtained from the details disclosed and they are therefore preferably followed. However, within the scope of the invention as :claimed, modificainner ends disposed near the center of said opening, said inner ends being obliquely turned in the same direction with respect tothewall of said opening to impart cyclonic motion to the air discharged from said nipples. 2A structure as specified in claim 1; said nipples extending obliquely toward the manifold-engaging side of the plate.

3. An auxiliary air admission device comprising a cast metal plate for disposition between a carbureter and an intake manifold,

said plate having an opening for communication with the manifold, a main air nlet tube moulded in said plate at one side of the opening and disposed parallel with a line extending diametrically across said opening and a plurality of branch air conducting tubes secured to and communicating with said main tube, said branch tubes all extending laterally from one side of the main air tube, being moulded in said plate and having their free ends projected into theaforesaid opening at circumferentially spaced points to form air discharge nipples, said nipples having open inner ends disposed near the center of said opening,said inner ends being obliquely turned in the same direction with respect to the wall of said opening and obliquely directed toward the manifold-engaging side of the plate, whereby to impart cyclonic motion to the air discharged by said tubes.

In testimony whereof have hereunto affixed my signature.

1 V ALFRED LEE. 

